PvP without tower shield?

Is it possible to get to a warlord status in pvp without training the spell tower shield? If so, at what level should a start doing ranked pvp, should I use treasure cards, and are there any good strategies?Thanks,Sarai ThunderstriderJourneyman

Well...I got veteran on my Level 48 balance, I didn't train tower but I have Tc towers packed in. I didn't train tower because my balance has elemental shields and spirit shields. But even with elemental shields and spirit shields in I do still lose. I recommend if you don't learn tower pack alot of tc towers in, you will need it.